For me it boils down to the movements involved, and the desired time domain. I also make sure the cards are shuffled back into the deck and that there's a predetermined number of hands for the session. And if you're looking for a tougher challenge, use a Pinochle deck - it has the same suits and is simply two sets of the 9s, 10s, Js, Qs, Ks and As, 48 cards total. Have fun